Interface MetaTy

interface MetaTy {
    get isConst(): boolean;
    get jp(): Joinpoint;
    get semantics(): Semantics;
    generateLifetimeAssignments(
        builder: LifetimeAssignmentBuilder,
    ): [LifetimeAssignmentBuilder, MetaRegion][];
    toTy(regionMap: Map<string, Region>): Ty;
}